CVE-2012-3494
xen - denial of service
EPSS 0.11%
Description
The set_debugreg hypercall in include/asm-x86/debugreg.h in Xen 4.0, 4.1, and 4.2, and Citrix XenServer 6.0.2 and earlier, when running on x86-64 systems, allows local OS guest users to cause a denial of service (host crash) by writing to the reserved bits of the DR7 debug control register.
How to fix CVE-2012-3494
To remediate CVE-2012-3494, upgrade the affected package to a fixed version below.
- Debian/xen—upgrade to 4.1.3-2 or later
- Debian/xen—upgrade to 4.0.1-5.4 or later
Is CVE-2012-3494 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 4.1.3-2
- from 0, < 4.0.1-5.4